You can get more out of your navigation system or hiking GPS with various accessories. For example, you can use a case to protect your device from scratches. With a holder, you can mount your bike navigation on your bike's handlebar and with a motorcycle headset, you can communicate with other motorcyclists. Do you want to download extra map material? You'll usually need a memory card that you insert into your navigation system after downloading. You can also find memory cards that already contain cards. This way, you're ready to go.